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A sub-group represents stratification criteria that can be used to assign patients to study arms and assess study outcomes. Sub-group information is required for Complete trials only, and optional for Abbreviated trials.

Trials can have multiple sub-group records. Each record displays the following information about the disease or conditions:

Field

Definition

Code

Characters, or phrase used to identify the sub-group

Description

Stratification criteria

Check out the trial before you begin abstraction

Before you begin abstracting or validating any trial, be sure you check it out first. Otherwise you will not be able to modify any trial data.


Sub-groups Information page
Sub-Groups Page

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Topic Links

Adding Subgroups

You can add one or more sub-groups to a trial according to the trial’s design details.

How to Add Sub-groups

  1. Search for the trial of interest. In the search results, click the NCI Trial Identifier link for that trial.
  2. On the Scientific Data menu, click Sub-groups. The Sub-groups page appears, with or without any sub-group records displayed.
  3. Click Add. The Add/Edit Sub-group Information page appears.
    Add Edit Sub-group Information page
  4. In the Code field, enter a unique sub-group identifier.
  5. In the Description field, enter a brief description of the sub-group.
  6. Click Save.
  7. Repeat the steps above until all sub-groups have been added.

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Editing Subgroups

You can edit sub-group records as necessary.

How to Edit Sub-group Records

  1. Search for the trial of interest. In the search results, click the NCI Trial Identifier link for that trial.
  2. On the Scientific Data menu, click Sub-groups. The Sub-groups page appears.
  3. In the Edit column for a given record, click the Edit icon. The Add/Edit Sub-group Information page appears.
  4. Modify the sub-group details according to instructions in Adding Sub-Groups.
  5. Click Save.

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Deleting Subgroups

When you delete groups from a trial, you delete them from the system, and can not recover them. If you delete a record accidentally, follow the instructions in Adding Sub-Groups to add it back.

How to Delete Sub-groups

  1. Search for the trial of interest. In the search results, click the NCI Trial Identifier link for that trial.
  2. On the Scientific Data menu, click Sub-groups. The Sub-group page appears.
  3. In the Delete column for the appropriate record, click the Delete icon.

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